Grade By Question - Keyboard Shortcuts

The Keyboard shortcuts in Speedgrader need to be updated to make the Grade by Question feature more useful. Specifically:

The J/K shortcut to switch between students doesn't work if the student panel is not active. You can now press Enter to update the student's score, but then still have to go back to the mouse to select the next student.

There should be a shortcut to jump directly between individual score boxes for each question, such as the up/down arrows, or the letters I/M?